Seismic Isolator High Damping Seismic Isolation Rubber Bearings for Railway and Building

• Customization: Available
• After-sales Service: Technical Guidance
• Warranty: 2 Years After Leaving The Factory
• Model NO.: rubber bridge bearing
• Certification: DIN, JIS, GB, BS, ASTM, AISI, ISO,RoHS,CE
• Usage: Beam Bridge, Highway Bridge, Railroad Bridge
• Structure: Laminated Rubber Bearing
• Material: Steel Bearing
• Activity: Multi Direction Movable Bearing
• Product Name: High Damping Seismic Isolation Rubber Bearing
• Damping Ratio Grades: 15%,12%,10%
• Advantage: Long Working Life
• Application: Highway Bridge, Railway Bridge, Viaduct, Seismic I
• Hardness: 55 - 65 Shore a
• Tensile Strength: ≥18 MPa
• Shear Modulus: 0.8 - 1.4 MPa
• Shape: Circle and Rectangle
• Operating Temperature: -40°C to +60°C
• Certifications: ISO 9001:2015, ISO 14001, ISO 45001, CE En 15129,
• Transport Package: Pallet
• Specification: rubber and steel plate
• Trademark: HengJingGong
• Origin: China
• HS Code: 4016999090
• Production Capacity: 100set/Month
• Package Size: 30.00cm * 30.00cm * 20.00cm
• Package Gross Weight: 60.000kg

Product Description

Product Description

High Damping Rubber Bearing – Fixed and Sliding Types for Large Displacement

    High damping rubber bearing, also called HDR bearing pad, is one of seismic isolation bearing. It has excellent seismic isolation performance to effectively reduce the bridge damage caused by earthquake.

    HDR bearing pad is composed of specialized designed rubber with high damping performance, sandwiched together with steel plate layer. When installing, the high damping rubber bearing is commonly used with top and bottom steel plate and connection accessories.

Working principle

During earthquake, the vibration from various directions will impact fixed base building and results in deformation and building or bridge damages. The high damping bearing pad is improved through high damping material, which the damping ratio can approach to 15% to 18%.

When the earthquake comes, the high damping rubber bearing will increase the horizontal displacement through rubber shear deformation and reduce friction coefficient. The large displacement can weaken the vibration from all direction and reduce the damage of building and bridges.

Joint structure

*The HDR (Ⅰ) rubber bearing. It is designed with top and bottom embedded steel plate. And the rubber bearing is connected with pier and beam by sleeve. The top and bottom loading plate is connected with sleeve by anchor bolt. The top and bottom embedded steel plate is connected with sleeve by welding.
*HDR (Ⅱ) rubber bearing. It is designed with top embedded steel plate and without bottom embedded steel plate. The bottom loading bearing is connected with sleeves with anchor bolts. The top embedded steel plate is connected with top loading plate with shear tenon. And the top embedded steel plate is connected with sleeve by welding.

 HDR (Ⅰ) rubber bearing.

HDR (Ⅱ) rubber bearing.

Specification

Parameter Name	Unit	Specification Range
Damping Ratio	%	≥12
Load Capacity	kN	As per design requirement
Vertical Stiffness	kN/m	As per design requirement
Horizontal Stiffness	kN/m	As per design requirement
Vertical Compression Deformation	mm	≤10
Horizontal Deformation	mm	≤30
Durability	-	Fatigue life over 20 million cycles
Temperature Range	℃	-40 to +70

Functions

Product Features

1.Period Extension: Horizontal stiffness 0.5-2.0kN/mm, extends structural period by 2-3 times
2.Energy Dissipation: Full hysteresis loops with equivalent damping ratio 15%-25%
3.Load Support: Vertical capacity 500-30,000kN, stably supports superstructure
4.Self-centering: Automatically returns to initial position, residual deformation <5%
5.Displacement Limiting: Limit device activates at large deformation to prevent falling off

1.High Vertical Stiffness: Vertical compression modulus 800-1000MPa, withstands building weight
2.Horizontal Flexibility: Shear modulus 0.4-0.8MPa for effective isolation
3.Large Deformation Capacity: Design shear strain ≥200%, ultimate strain ≥350%
4.Excellent Durability: Anti-aging and ozone resistant, 50-year design life matching building lifecycle
5.Temperature Adaptation: Stable performance from -40℃ to +60℃

Product Details

Customer Visit

Packaging & Shipping

Company Profile

    Hengshui Jingtong Rubber Co., Ltd., located in Hebei Province's Hengshui City, is a professional manufacturer of engineering rubber products. Our product range includes bridge bearings, expansion joints, water stop strips, water stop belts, inflatable cores, building deformation joint device and water plugs, which are widely used in bridge, tunnel, water conservancy, and power engineering projects. The company boasts advanced technology and mature processes to ensure reliable product quality.

    We have a professional technical team and a comprehensive after-sales service system to ensure customers receive high-cost-performance products and attentive service. Hengshui Jingtong Rubber Co., Ltd. is committed to continuous innovation to meet market demands and looks forward to esta  blishing long-term cooperative relationships with customers from both domestic and international markets.